/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/resource.py
ViewVC logotype

Diff of /branches/WIP-pyshapelib-bramz/Thuban/Model/resource.py

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 1755 by bh, Fri Sep 26 14:03:44 2003 UTC revision 1786 by bh, Wed Oct 8 10:39:11 2003 UTC
# Line 47  except ImportError: Line 47  except ImportError:
47      pass      pass
48    
49  def read_proj_file(filename):  def read_proj_file(filename):
50      """Read a single .proj file and return a ProjFile object.      """Read a .proj file and return a ProjFile object and warnings
51        
52      Raises IOError if the file cannot be opened.      The return value is a tuple with the ProjFile object and a list of
53      Raises OSError if the file cannot be read.      strings with warnings messages that might have been generated by the
54      Raises SAXParseException if the file is not valid XML.      proj ifle parser.
     """  
55    
56        Raises IOError if the file cannot be opened, OSError if the file
57        cannot be read and SAXParseException if the file is not valid XML.
58        """
59      handler = ProjFileReader()      handler = ProjFileReader()
60      handler.read(filename)      handler.read(filename)
61      return handler.GetProjFile()      return handler.GetProjFile(), handler.GetWarnings()
62    
63  def write_proj_file(pf):  def write_proj_file(pf):
64      """Write a single .proj file      """Write a single .proj file
# Line 67  def write_proj_file(pf): Line 69  def write_proj_file(pf):
69      saver = ProjFileSaver(pf)      saver = ProjFileSaver(pf)
70      saver.write(pf.GetFilename())      saver.write(pf.GetFilename())
71    
 def get_proj_files(dir):  
     """Read all .proj files in the given directory and  
     return a list of ProjFile objects.  
     """  
72    
73      list = []  def get_system_proj_file():
74      try:      """Return the standard projections and a list with warnings
75          dirlist = os.listdir(dir)  
76      except OSError:      The projections read from the default thuban projection file
77          pass # if we can't get a directory listing just return []      (usually in Resources/Projections/defaults.proj). The return value
78      else:      is a tuple with the projections in a ProjFile object and a list of
79          for file in filter(lambda s: s.endswith(PROJ_EXT), dirlist):      strings with warning messages. The warnings list is usually empty
80              try:      but may contain messages about ignored errors.
                 filename = os.path.join(dir, file)  
                 list.append(read_proj_file(filename))  
             except (OSError, IOError, SAXParseException):  
                 pass # just move onto the next file  
   
     return list  
   
 def get_system_proj_files():  
     """Return a list of ProjFile objects from files that are  
     supplied by Thuban.  
81    
82      If no files could not be opened return a list with one      If the file could could not be opened return an empty projection
83      empty projection file set to store data in the default file.      file object set to store data in the default file.
84      """      """
85      filename = os.path.join(projdir, "defaults.proj")      filename = os.path.join(projdir, "defaults.proj")
86      try:      try:
87          return [read_proj_file(filename)]          return read_proj_file(filename)
88      except (OSError, IOError, SAXParseException):      except (OSError, IOError, SAXParseException), val:
89          return [ProjFile(filename)]          msg = _('Could not read "%s": %s') % (filename, str(val))
90            return ProjFile(filename), [msg]
91    
92    def get_user_proj_file():
93        """Return the user's projections and a list with warnings
94    
95        The projections read from the user's thuban projection file (usually
96        in ~/.thuban/user.proj). The return value is a tuple with the
97        projections in a ProjFile object and a list of strings with warning
98        messages. The warnings list is usually empty but may contain
99        messages about ignored errors.
100    
101  def get_user_proj_files():      If the file could could not be opened return an empty projection
102      """Return a list of ProjFile objects from files that are user-defined.      file object set to store data in the default file.
   
     If no files could not be opened return a list with one  
     empty projection file set to store data in the default file.  
103      """      """
   
104      usrdir  = get_application_dir()      usrdir  = get_application_dir()
105      filename = os.path.join(usrdir, "user.proj")      filename = os.path.join(usrdir, "user.proj")
106      try:      try:
107          return [read_proj_file(filename)]          return read_proj_file(filename)
108      except (OSError, IOError, SAXParseException):      except (OSError, IOError, SAXParseException):
109          return [ProjFile(filename)]          msg = _('Could not read "%s": %s') % (filename, str(val))
110            return ProjFile(filename), [msg]
111    
112    
113  class ProjFileReader(XMLReader):  class ProjFileReader(XMLReader):
114    
115      def __init__(self):      def __init__(self):
116          XMLReader.__init__(self)          XMLReader.__init__(self)
117          self.__pf = ProjFile("")          self.projfile = ProjFile("")
118            self.warnings = []
119    
120          XMLReader.AddDispatchers(self,          XMLReader.AddDispatchers(self,
121              {'projection': ("start_projection", "end_projection"),              {'projection': ("start_projection", "end_projection"),
122               'parameter':  ("start_parameter", None)})               'parameter':  ("start_parameter", None)})
123                
124      def read(self, file_or_filename):      def read(self, file_or_filename):
125          XMLReader.read(self, file_or_filename)          XMLReader.read(self, file_or_filename)
126    
127          self.__pf.SetFilename(XMLReader.GetFilename(self))          self.projfile.SetFilename(XMLReader.GetFilename(self))
128            
129      def start_projection(self, name, qname, attrs):      def start_projection(self, name, qname, attrs):
130          self.params = []          self.params = []
131          self.name = self.encode(attrs.get((None, 'name'), _("Unknown")))          name = self.encode(attrs.get((None, 'name')))
132            if name is None:
133                name = _("Unknown")
134            self.name = name
135    
136      def end_projection(self, name, qname):      def end_projection(self, name, qname):
137          self.__pf.Add(Projection(self.params, self.name))          try:
138                proj = Projection(self.params, self.name)
139            except IOError, val:
140                self.warnings.append(_('Error in projection "%s": %s')
141                                     % (self.name, str(val)))
142            else:
143                self.projfile.Add(proj)
144    
145      def start_parameter(self, name, qname, attrs):      def start_parameter(self, name, qname, attrs):
146          s = attrs.get((None, 'value'))          s = attrs.get((None, 'value'))
# Line 142  class ProjFileReader(XMLReader): Line 148  class ProjFileReader(XMLReader):
148          self.params.append(s)          self.params.append(s)
149    
150      def GetProjFile(self):      def GetProjFile(self):
151          return self.__pf          return self.projfile
152    
153        def GetWarnings(self):
154            """Return the list of warning messages that may have been produced"""
155            return self.warnings
156    
157    
158  class ProjFileSaver(XMLWriter):  class ProjFileSaver(XMLWriter):
159    
Legend:
Removed from v.1755  
changed lines
  Added in v.1786
[email protected]
 ViewVC Help
Powered by ViewVC 1.1.26